RFI - ADG1451.22 Dewatering Management Plan_Rev0_28.02.23

                                                                                                 ADG Consulting Pty Ltd


2    Site characteristics
2.1 Property description
     The site is described as Lots 2 & 3 on MCH3881, and is situated at 130‐132 Gympie Terrace, Noosaville,
     Queensland. From most recent available aerial mapping dated 24 November 2022 (Nearmap), the site
     has been cleared of aboveground infrastructure (circa June‐July 2022) and is generally square to
     trapezoidal in shape. The site has a combined area of 1,581 m2. The site locality is shown in Figure 1,
     Appendix A.
2.2 Surrounding environment
     The surrounding environment and land use is described briefly in Table 1.

     Table 1 Surrounding land use and environment

              Direction                                                Environment

                North             Chaplin Park, then Noosa River.

                 East             2‐ storey residential lots, then canal network associated with Noosa River.

                South             Gympie Terrace, then multiple residential lots.

                West              Cleared vacant land, then residential lot, then Mill Street.


2.3 Topography
     The site and surrounding land is considered to be generally level (PG, 2022), with the site surface
     elevations ranging between approximately 1.3 m to 1.8 m AHD from the southern boundary toward the
     north of the site (refer SCG earthworks and piling plan).
2.4 Geology & soils
     The surface geology at the site is mapped as being Pleistocene aged sandy mud, muddy sand and minor
     gravel: estuarine channels and banks. The dominant rock type is identified as miscellaneous
     unconsolidated sediments as referenced through detailed surface geology (accessed via Queensland
     Globe online, 28 February 2023).

     The Acid Sulfate Soils (ASS) map 1:100,000 scale categorises the site as ‘SEA’ or ‘Disturbed Land with
     probability of ASS’, indicating that the site is likely to contain acid sulfate soils but the type and depth to
     ASS has not been defined (accessed via Queensland Globe online, 28 February 2023).
2.5 Hydrogeology
     A search of groundwater bores licensed by DRDMW was conducted by ADG on 28 February 2023. The
     search identified no licensed bores within a 200 m radius of the site. A map showing the bore search area
     is provided in Appendix B.

     Based on the local geology and topography, and the site’s proximity to the Noosa River, the inferred
     groundwater flow is to the north and/or east. Groundwater beneath the site is likely to be hydraulically
     connected to the river and/or canal network, therefore saline groundwater conditions are anticipated,
     and additional saltwater intrusion is likely to occur during dewatering.




ADG1451.22 Dewatering Management Plan_Rev0_28.02.23                                                               Page 3